after theese steps I rebooted the PC, and I can no longer be run ubuntu.
Why ubuntu drastically limits the system setup options. Through the GUI and deny basic settings such as on Num Lock on the log screen. And user must look for different solutions which can damages their system.
Thank you community very much :(

Normally, LightDM (greeter) would remember your last entry and numlockx is no longer needed. So if you activate num-lock at login (manually by pressing the NUMLOCK key on your keyboard), it should stay like this.
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MrVaykadjiMar 5 '14 at 12:25